Duldulao, A. C. (1977). An evaluation of extension coordination in and among forestry agencies in the Philippines [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Duldulao, Anacleto C. An Evaluation of Extension Coordination in and Among Forestry Agencies in the Philippines [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Duldulao, Anacleto C. An Evaluation of Extension Coordination in and Among Forestry Agencies in the Philippines [microform]. Photoduplication Service. University of the Philippines Library, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.